Log in

View Full Version : Another Boiler Problem!

DarrenSV650S
04-01-10, 10:19 PM
We've got an instant gas boiler. Recently when I've been using the shower the water doesn't get hot, it's just lukewarm. The only way to get it hot is to only open the tap very slightly so that the water is coming out slower.
And the kitchen tap keeps changing from hot to warm when it's being used

I was thinking it could maybe be something to do with the pressure sensor for the hot water? Is that adjustable?

Anyone know what the problem could be?


Some pics

http://i88.photobucket.com/albums/k164/DarrenStewartTait/DSCF0001-32.jpg

http://i88.photobucket.com/albums/k164/DarrenStewartTait/DSCF0002-27.jpg

http://i88.photobucket.com/albums/k164/DarrenStewartTait/DSCF0003-26.jpg
Specialone
04-01-10, 10:29 PM
Believe it or not when the weather is colder outside, i mean proper cold, the bolier is working harder to heat the water up, mine does the same, i have to turn it more to the left for hotter on the shower.

Could be the thermistors also.
Rumble bee
04-01-10, 10:57 PM
Could be the thermistors also.


+1


Chris.
DarrenSV650S
04-01-10, 11:14 PM
Hmm I'll try cranking up the water temperature then
Kinvig
05-01-10, 12:25 PM
Which vokera model is that?

It looks older than mine - but you have an auto button! I wish I had one of those.

Much boiler envy!
454697819
05-01-10, 12:27 PM
yep.. typically its the boiler output, its trying to heat up water fro 5 to 45 dges v v quickly, so if you turn the temp up this should help.

Heating water for showers is what works the boiler the hardest.
rpwoodman
05-01-10, 12:43 PM
Next to your central heating pump (I'm assuming you have heating, just not hot water?), there should be a 2/3 way valve, with a little lever on it. It'll be set to auto but move it to open and I think that should give you some hot water. These valves seem to last 5-7 years.
Luckypants
05-01-10, 01:04 PM
Next to your central heating pump (I'm assuming you have heating, just not hot water?), there should be a 2/3 way valve, with a little lever on it. It'll be set to auto but move it to open and I think that should give you some hot water. These valves seem to last 5-7 years.

Unlikely to be a 3-port valve on a combi-boiler, which this one seems to be.
Damian
05-01-10, 01:24 PM
The only way to get it hot is to only open the tap very slightly This has happened to me b4..on jobs iv been out to.. if the water is coming out of the sink taps OK (HOT) ..but not the shower them its the thermostat on the shower or u some time have small flat fitters in the shower were u turn on the shower they may need clearing. let me know :thumleft:
DarrenSV650S
05-01-10, 06:25 PM
Just turned it up today so I'll test it tomorrow. The shower doesn't have a thermostat
Bri w
05-01-10, 06:36 PM
Clicked on expecting a picture of the wife.

*checks to make sure wife isn't in the room*
Bluefish
05-01-10, 06:55 PM
gas valve may also be set incorrectly, it might not be modulating correctly, but thermisters is +1, and as said, your stat h/w on the boiler needs to be quite high if you are used to hot hot water, due to the weather, if the problem is with the shower then you will possibly need a new shower cartridge